Lock.



Patented Dec. I6, |902..-

nu.v 716,27.

(No Model.)

` Wnesses.'

trice.

JEREMIAH OCONNOR, OF

LEAVEN VOR'III, KANSAS.

Lock.`

SPECIFICATION forming part of Letters Patent No. 716,270, dated December 16, 1902.

Application filed April 19, 1902.

To all whom it may concern: i

Be it known thatl, JEREMIAH OCoNNoR, a citizen of the United States, residing at Leavenworth, in the county of Leavenworth and State of Kansas, have invented certain new and useful Improvements Ain Locks, oi which the following is a specitication.

My invention relates to improvements in locks; and the essential eaturesof the invention may be said toconsistin the peculiararrangement and construction of the tumblers employed for operating the bolt.

Theobject of my invention is to provide a lock wherein access to the tu mbler that throws the bolt isnormally barred by a sliding keyhole plate and a secondary tumbler', which must be properly manipulated before the first-mentioned tumbler can be reached `with the key.

The invention may be further said to consist in the novel arrangement andcombination of parts hereinafter described, and pointed out in the appended claims. 'v

In the accompanying drawings, which illustrate the invention,gFigurej1represents a t plan View, partly in section, of the lock with the face-plate removed to showits interior mechanism. Fig. 2-isalongitudinal section taken on the line II II of Fig. 1. Fig. 3 is a broken plan view of the lock with the sliding keyhole-plate in position thereon. Fig. 4 is a broken plan view of the lock with the sliding keyhole-plate removed. AFig.V 5 is an en-` larged sectional view of the secondary tumbler, taken on the line V of Fig. 2.`

1 indicates the case, which may be of any suitable shape, and 2 is the face-plate, by the removal of which access may be had tothe interior mechanismof the lock.

3 indioatesthebolt,which is reciprocally located withinpthe case. and provided with curved notches m4, adapted to be engaged one at a time by a spring-actuated pin 5, for the purpose of assisting in retaining the bolt in a locked or unlockedposition. The forward movement of the bolt is limited by an integral shoulder 6, adapted to contact with the end of the case, and its backward movement is limited by astop 7, cast integral with the inner sideA of the case. The opposite sides of the rear portion of the bolt are provided with Serial No. 103,682. (No model.)

mortised tooth racks 8, which mesh with toothed segmental tumblers 9 and l0, having stud shafts 11, journaled in the casing. Tumbler 10 also has a rectangular post 12, adapted to beengaged by` a key 13 when it is desired to operate said tumbler.

. The above construction is not regarded as broadly new, and the essential features of the invention reside in the means employed to baffle those not familiar with the construction of the lock from gaining access to the "post 12. Said means consist of a sliding plate 14, secured to the face-plate by a screw 15 and. pins 16, which operate in slots 17 in the face-plate. The sliding plate is provided with a keyhole 18 and a rectangular lug 19, which extends through a slot 2O in the faceplate and limits the rotation of a secondary tumbler 2l by contacting with a lug22 thereon. Said tumbler is journaled in the back and face plates of the case and has a transverse groove 23, which registers with the keyhole. Its shoulder 22 is normally held in contact with lug 19 by a spiral spring 24, secured atits opposite ends to the tumbler and a post 25, projecting from the back of the casing.

As the secondary tumbler is intended simply as a blindto the uninitiated,its rotation, of course, will have no eect upon the bolt, and in order to operate the latter it is necessary to first turn the tumbler one-quarter of a revolution, so that its groove will register with the'slot 2O in the face-plate. Then by pushing the key to the right and downwardly fover the post-after the end of the groove has been reached tumbler 10 may be turned. to .either throw or retract the bolt.

When the key is pushed tothe right, as above described,the sliding plate moves therewith andflug 20 engages groove 23 and prevents the spring 24 from turning and binding the secondary tumbler against the key, and thus render it difficult to push the latter over to post 12.'

Afterthebolt has been operated and the key withdrawn that portion of slot 2O over the stud is immediately closed by thesliding keyhole-plate,which is retracted by coiled springs 26, and the secondary tumbleris rotatedbajck to its normal position by spring 24.

While I have not shown or described a ICO latch bolt or knob, it is lobvious that the lock may be provided with the same When used on doors requiring a knob.

Having thus described my invention, What Iclaim as new, and desire to secure by Letters v Patent, is-

l. In a lock, a tumbler for actuating the bolt, a slot in the case for gaining -access t0 the tumbler, a sliding keyhole-plate adapted to normally close that portion of the slot over the tumbler, a lug on the sliding keyholeplate which extends through the slot in the case, and a secondary tumbler which normally obstructs the path of the lug, substantially as described.

2. In a lock, a tumbler for actuating the bolt, a slot in the case for gaining access to the tumbler, a sliding keyhole-plate adapted to normally close that portion of the slot over the tumbler, a lug Von the sliding keyholeplate which extends through the slot of the case, a secondary tumbler which normally ohstructs the path of the lug, and a groove in said tumbler to provide a path for the lug, substantially as described.

3. In a lock, a tumbler for actuating the bolt, a slot in the case for gaining access to the tumbler, a sliding keyhole-plate, springs for normally holding said plate over that portion of the slot above the tumbler, a lug on the sliding keyhole-plate which extends through the slot in the case, a secondary tumbler, a spring for normally holding the latter in a closed position to the path of the lug, a groove in the tumbler,'and a key for turning the latter so the groove will be substantially as described.

In testimony whereof I affix my signature in the presence of two Witnesses.

JEREMIAH OCONNOR.

Witnesses:

F. Gr. FISCHER, G. Y. THORPE.

presented to the lug,I 

